Vulnerability Description
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Broadcom | Rabbitmq Server | >= 3.13.0, < 4.2.6 |
Related Weaknesses (CWE)
References
- https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97cPatch
- https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62aPatch
- https://github.com/rabbitmq/rabbitmq-server/pull/15936Issue TrackingPatch
- https://github.com/rabbitmq/rabbitmq-server/pull/15940Issue TrackingPatch
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6Release Notes
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vExploitVendor Advisory
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vExploitVendor Advisory
FAQ
What is CVE-2026-57216?
CVE-2026-57216 is a vulnerability with a CVSS score of 6.8 (MEDIUM). RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest t...
How severe is CVE-2026-57216?
CVE-2026-57216 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-57216?
Check the references section above for vendor advisories and patch information. Affected products include: Broadcom Rabbitmq Server.